Is there any way to improve the brightness of the background and target when taking photos in the hotel?

When the flash is shooting, the exposure is controlled by the aperture, that is, the exposure of the subject (your classmate, etc.). ), and the ambient light of the hotel is a constant light source, and the shutter and aperture * * * jointly control the main body illuminated by this light source. Therefore, in practical application, the exposure degree of the two should be considered separately. You can turn off the flash to take a picture, see what the shutter time is for normal exposure, and then use shutter priority mode to adjust the shutter time to the shutter time of the photo you just took. At this time, the flash that controls the exposure of the subject will adjust the output according to the distance from the subject. However, it should be noted that the camera should not be too close to the main body, otherwise the camera will narrow the aperture, so the ambient light is still not ideal, and it will be better to keep a little distance.